اللَّهُمَّ بَارِكْ لَهُمْ فِيمَا رَزَقْتَهُمْ، وَاغْفِرْ لَهُمْ وَارْحَمْهُمْ
Allahumma barik lahum fima razaqtahum, waghfir lahum warhamhum
Ee Allah, wabariki katika ulichowapa riziki, na wasamehe na uwahurumie.
Dua for the host when being a guest
Making dua for those who host you is from the sunnah.